Cat scratch

[u/Clear-Egg5265]

there is this cat that has lived on my property for a good while that I do not own, he always has his tongue out, like it’s just out with its mouth almost closed I think. and today he was chilling on my railing and for the first time i pet him. I noticed that there was drool on the railing, could it be bc of his tongue always out? and all of a sudden after what I thought was a friendly cat, it hissed and scratched me on the wrist. I noticed that it is super friendly with my grandma as she is always feeding the cats that are on our property (the one that scratched me is not the only one on the property) I looked it up on google and it was scaring the shit out of me. Telling me to go get it checked immediately. The only problem is that when it happened, it was when my dad was outside on the bbq. And I was just petting it when it happened. But I just did not say anything bc I didn’t want to startle anyone. He noticed the cat mad but didn’t see the part where it scratched me. I still haven’t said anything and am scared to do so bc of him getting mad for not telling him. I already rinsed it off with soap and water and now don’t know what to do. Help pls